Furnace



(No Model.) 7 2 Sheets-Sheet 1. M. KEARNEY 8c M. O. HAWLEY.

FURNACE.

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N4 PETERS, Phomuma n her, Wishinglon. o. c,

2 Sheets-Sheet 2. M. KEARNEY & M. 0 HAWLEY.

(No Model.)

FURNACE.

No. 313,939. Patented Mar. 1'7, 1885..

UNKTF grates arena tries.

MICHAEL KEARNEY, OF SPRINGFIELD, AND MELVILLE O. HA\VLEY, OF ST. LOUIS, MISSOURI.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 313,939, dated March 17, 1885.

Application filed September 5, 1884.

To aZZ whom it iii/cry concern:

Be it known that we, MICHAEL KEARNEY and MELVILLE O. HAWLEY, residents, respectively, of Springfield, Missouri, and St. Louis, Missouri, have jointly made a new and useful Improvement in Furnaces, of which the following is a full, clear, and exact description, reference being had to the annexed drawings, making part of this specification, in Which Figure l is a view in perspective of the improvement; Fig. 2, a top View of the lower chamber; Fig. 3, a front elevation showing the improvement applied to a boiler; Fig. 4., a vertical transverse section on the line 4 4. of Fig. 5, and Fig. 5 a vertical longitudinal section on the line 5 5 of Fig. 3.

The same letters of reference denote the same parts.

In the present furnace an upright thin fire is employed. The air forsupporting the combustion is supplied to the fire mainly at the front; but the air-supply may be supplemented by other air-currents entering the fire-chamber from beneath, from above, and at the sides of the fire-chamberthat is, the fire in a transverse direction is notlimited, and in an upward and downward direction it may be varied considerably, but in the direction of the length of the furnace the fire is-eXtended but a short distance, say eight inches. The products of combustion and the heated currents pass through and from the rear side of the firechamber into a chamber in the rear of the fire-chamber. This rear chamber may be a flue for conducting the heat to the point where it is desired to apply the heat, or it may be a chamber in which the combustion of the fuel is perfected, and out of which a flue may lead, or it may beof any shape and nature suitable for receiving and utilizing the heat proceeding from the fire-chamber; but whatever form it otherwise assumes it should be suitable for receiving the heated currents from the rear side of the fire-chamber in distinction from receiving them from the top or from the bottom of the fire-chamber. The fire'chamber is thus made with openings both in its front and in its back. It is adapted to receive the fuel at its upper end, and at its lower end it should be constructed so that the ashes, if any are (No model.)

low to admit of a water circulation therein,

which serves to render the construction more durable, and also to increase the heating-surface when the furnace is used in connection with a steam-boiler.

The improvement is adaptable to many constructions in which the use of heat is involved, and especially to many forms of steam-boilers, including locomotive boilers as well as stationary.

The improvement is illustrated in connection with an ordinary return-flue boiler, A, Figs. 3, 4, 5, and the best mode of carrying out the improvement is shown in Figs. 1, 2, 3, 4, 5.

B, Fig. 1, represents the fire-chamber. It is composed,substantially,of the tubes 0 O O and the chambers D E, the tubes at their lower ends opening into the lower chamber,D, and at their upper ends into the upper chamber, E. The water-circulation through the tubes and chambers is provided for by means of the pipes F F, which lead from the boiler A to the upper chamber, E, entering the latter through the openings 6 6, Fig. 1. By means of the front plate, G, Figs. 3, 5, the top plate, H, Figs. 4., 5, and the side plates, I I, Fig. 4., an air-flue, J, is provided in front of and above the fire-chamber. The air, as indicated by the arrows in Fig. 5, passes upward into the flue J, and thence backward between the tubes 0 O G into the fire-chamber. A portion of the air-current passes to the top of the upper chamber, E. and thence downward, through the opening 0 in the upper chamber, into the fire-chamber. The fuel also is introduced through the opening 0. Other portions of the air-current pass between the side plates and the side tubes, 0 O, and thence between the tubes 0 0 into the fire-chamber. The front plate, G, has doors 9 9, Fig. 3, to provide access to the upper end of the fire-chamber when it is desired to introduce fuel thereinto. The lower doors, 9 Fig. 3, provide access to the front side of the fire-chamber, as when the fire needs stirring. A grate-bar, K,

Figs. 4, 5, may be used at the bottom of the fire-chamber, and there should be a suitable space or ash-pit, L, into which the ashes can fall.

M represents the chamber in rear of the firechamber.

The arrows in Fig. 5 indicate the course of the products of combustion thereto.

The tubes 0 Figs. 2, 5, are not preferably arranged directly in line with each other, but in the zigzag form, as shown, which is desirable, as thereby the cloggi ng of the spaces between the tubes 0 O is more effectually prevented. It is very desirable to keep these spaces between the tubes 0 0" open, as a free outlet from the rear side of the fire-chamber is essential to the proper working of the furnace. The rear portion, a", of the chamber E is preferably made higher than the front por tion, 0 to direct the air-current from above downward into the fire-chamber.

If it is desired, the air entering the flue J at its lower end can, by means of the plate N, Fig. 5, be cut off and prevented from passing above the chamber E.

WVe claim 1. In a furnace, a fire-chamber composed of vertical Water-circulating tubes arranged zigzag and connected to water-boxes at their upper and lower ends, substantially as described.

2. The combination,with acombustion-spaoe, M, and an air space or flue, J,ofa fuelfire-chamber composed of vertical tubes connected at I their upper and lower ends to water-boxes,

substantially as described.

3. The narrow vertical fire-chamber formed of vertical tubes, in combination with waterboXes having passages through them for supplying fuel and discharging the ashes, substantially as described.

4. The combination of a fuel fire-chamber, composed of a front and rear series of tubes, a fuel feed passage at the upper end thereof, an ash-discharge passage at the lower end thereof, a grate, an ash-pit, an air-flue, J, the front wall thereof provided with doors above and below, and a combustion-chamber,-M, substantially as described.

5. A fire-chamber formed of vertical tubes connected to a hollow base and to a hollow air-flue, J, on one side of said fire-chamber,

and a combustion-chainber. M, on the opposite side thereof, substantially as described.

MICHAEL KEARNEY. MELVILLE C. HA\VLEY.

Witnesses:

G. D. MOODY, J. XV. HoKn. 

